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Thermally controlled preferential molecular aggregation state in a thiacarbocyanine dye

2010; American Institute of Physics; Volume: 133; Issue: 13 Linguagem: Inglês

10.1063/1.3483896

1520-9032

Rémy Passier, James Ritchie, Carlos Toro, Carlos Díaz, Artëm E. Masunov, Kevin D. Belfield, Florencio E. Hernández,

Photochemistry and Electron Transfer Studies

Herein we report the experimental and theoretical study of the temperature dependence of a thiacarbocyanine dye in its monomer, H- and J-aggregates states. We demonstrate the ability to control the ratio of monomer, H- and/or J-aggregates with heat. We link such a control to the conformation dependence of the molecule. An alternative way to gain access to the dominating species without changing the concentration as a complete switching mechanism between all the present species is proposed. The results presented in this work lead to a better understanding of thiacarbocyanine dye's behavior.